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-4+6a=2-7a
We move all terms to the left:
-4+6a-(2-7a)=0
We add all the numbers together, and all the variables
6a-(-7a+2)-4=0
We get rid of parentheses
6a+7a-2-4=0
We add all the numbers together, and all the variables
13a-6=0
We move all terms containing a to the left, all other terms to the right
13a=6
a=6/13
a=6/13
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